What type of damage can the worm virus do?

(GRAMMAR TROLL ALERT!!): A worm is not a virus, just to clear that misconception up. Almost every casual computer user thinks that anything that can infect your computer is a virus, well their wrong. Trojans aren't viruses, worms aren't viruses, rootkits aren't viruses.

The sole purpose of a worm is to keep replicating itself and then distribute the copies to infect other computers. Worms just keep on copying and copying themselves until your computer grinds its teeth to a halt and eventually crashes. During the time in which your computer is slowing down, a hacker who is viewing the infected computer may enact a Denial of Service Attack or download more malware onto the victim's computer. Worms also have the ability to infect computers that are all connected to the same network as of the infected computer.